Buffer overflow in Microsoft Office 365 For Mac
CVE-2026-50387
Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Office 365 For Mac — versions 1.0.0
- Microsoft Office For Android — versions 16.0.1
- Microsoft Office Ltsc For Mac 2021 — versions 16.0.1
- Microsoft Office Ltsc For Mac 2024 — versions 16.0.0
- Microsoft Windows 10 Version 1607 — versions 10.0.14393.0
- Microsoft Windows 10 Version 1809 — versions 10.0.17763.0
- Microsoft Windows 10 Version 21h2 — versions 10.0.19044.0
- Microsoft Windows 10 Version 22h2 — versions 10.0.19045.0
- Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
- Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-50387?
- CVE-2026-50387 is a high-severity vulnerability in Microsoft Office 365 For Mac, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-07-14.
- How severe is CVE-2026-50387?
- High severity. CVSS v3 base score is 7.8 out of 10.